4320 with 3 bottoms

Responding to one of the comments in my rollover plow post earlier, yes the 4320 can pull a lot more. It just plays with the 3 x 18's although on a steep hill with clay it works it. I also have a problem rolling over the clay uphill on the steeper slops but I will save that for another post.

My issue is the 4320 really struggles to lift it. My son upped the pressure to the upper end of the spec. at the front pump but it did not make a difference. I have oil leaks at both the differential lock valve and the brakes. I have been looking at the 4020 service manual ( I don't have the 4320 service manual.) and it looks like there are many possible causes. One includes leakages at the brakes. I will have to redo the differential lock valve and brakes and then see if I have better results.

Right now I can just get it high enough to rotate the plow at the end of the furrow. Sometimes the coulter scrapes the ground. It's interesting, if I travel with the plow up for some distance it finally reaches something closer to full height. I believe the bouncing temporarily relieves the weight/pressure and each time it raises it a little more.

Anyway, I just thought I would put this out there and see if anyone had any other solutions for this that were common or "Check this first" items.

Paul

Myself i would be vary careful with jacking the Hyd. pressure up on a John Deere as i have seen what has happened when something goes wrong . I saw first hand on my uncles 4630 when it was brand new when something stuck on the pressure relief while lifting a seven shank Vee ripper and making a tight turn at the end of a field , something did not relief and when the three point hitch hit the top the back half of the rock shaft housing blew and sent the three point piston across the twp. road over into the parking lot of one of the potato storage barns about 300 hundred feet away. Saw a 3020 blo0w the right axle housing off while turning up hill on hill side to the south of me . Now as to the lifting capacity on the three point hitch of a 4320 i have no idea. and it would be wise to find out what it is before you end up with big problems.

You might try and adjust the linkage on the back of the tractor. Just bump the linkage with the handle of a hammer with the plow raised, be careful it might just raise a bit. Then if it does lower the plow and adjust the yoke a few turns each time, with the tractor shut off. chris

We have a 4200 setup as 3-18, I think it was originally a 4 bottom but they took the bottom off either because they couldn't lift it or could pull it, I'm thinking lift. I've pulled ours with a 4430 and 4440, I had trouble with the 4430 lifting high enough to flip it because it had 18.4-38's on. How does yours flip? We have trouble in the beginning of the season till the grease gets limbered up again.

Does the 3 point lift all the way up without anything hitched to it? You should not be able to lift the arms any farther by hand with the lever at full raise. Sounds like some hyd testing and diagnosis is in order. Check all rockshaft and load control linkage adjustments. That tractor should play with lifting that plow. Dad's 3020 would lift that plow without hesitation but if not stopped the front end would come up first.